Results 131 to 140 of about 2,922 (181)

Helminths of the Black Bear, Ursus americanus, in New Brunswick

The Journal of Parasitology, 1994
Between May 1989 and October 1991, 544 black bears Ursus americanus were collected in New Brunswick and examined for Trichinella spiralis larvae. In addition, 110 of these bears were examined for filarial nematodes, and the entire intestinal tracts of 12 bears were examined for intestinal helminths.
Duffy, M S, Greaves, T A, Burt, M D
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Breeding behavior of the American black bear Ursus americanus

Theriogenology, 2003
By means of videotape, we observed and timed courtship, mating, and refractoriness in the American black bear while confined in a semicaptive environment. Sixty-six courtships resulted in mating. During courtship, the male detected estrus and receptivity in the female. Courtship lasted 22.5+/-2.3s (mean+/-S.E.M.).
William R, Boone, M Elaine, Richardson, Jennifer A, Greer   +2 more
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Demodicosis in black bears (Ursus americanus) from Florida

Journal of Wildlife Diseases, 1993
Demodicosis was diagnosed in five black bears (Ursus americanus) from north-central Florida. The first bear examined, a 5-yr-old male, had severe alopecia except for the dorsal neck, paws, and ears. The skin was characterized by moderate orthokeratotic hyperkeratosis, and mild to moderate follicular hyperkeratosis.
Forrester, D J, Spalding, M G, Wooding, J B   +2 more
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Hypersensitivity Angiitis in a Dormant Black Bear (Ursus americanus)

Journal of the American Veterinary Medical Association, 1970
SUMMARY A captive, 1-year-old female black bear (Ursus americanus) developed severe necrotizing lesions on all 4 paws, nose, and both ears. The bear was being used as a subject in a winter dormancy study and had been given multiple drug injections. The gross lesions resembled those found in some human angiitides, especially Wegener's or lethal midline ...
R C, Simmonds, C L, Wells
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Renal microvasculature of the black bear (Ursus americanus).

Acta anatomica, 1988
This study of the Black bear (Ursus americanus) was undertaken to provide basic information related to structural modifications in the renal microvasculature that might provide insight into the drastic alteration in renal urinary output that occurs during winter sleep.
Anderson, B.G., Anderson, W.D., Seguin, R.J.   +2 more
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Ursus americanus (American black bear)

1967
One or two pairs of small acrocentrics often have secondary constrictions of the long arms near the centromere.
T. C. Hsu, Kurt Benirschke
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Ursicoptes americanus infestation of American black bears (Ursus americanus) in Virginia, USA

Veterinary Parasitology: Regional Studies and Reports
American black bears (Ursus americanus) admitted to a Virginia rehabilitation center were tested for Ursicoptes americanus. From 2014 to 2023, 23 of 150 (15.3 %) bears were positive with higher prevalence in juveniles and females. Several bears had localized or multifocal, moderate lesions or alopecia consistent with mange; however, some had no ...
Jillian, Broadhurst, Raquel, Francisco, Peach, Van Wick, Karra, Pierce, David, McRuer, Ernesto, Dominguez, Leigh-Ann, Horne, Jess, Ransier, Michael J, Yabsley   +8 more
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CLINICAL MANGE OF THE BLACK BEAR, Ursus americanus, ASSOCIATED WITH Ursicoptes americanus (ACARI: AUDYCOPTIDAE)

Journal of Wildlife Diseases, 1980
Numerous specimens of a mite, Ursicoptes americanus Fain and Johnston, 1970 (Acari: Audycoptidae), were found in skin scrapings from an aged female black bear, Ursus americanus, afflicted with a severe generalized mange. The mite had not been found previously in association with clinical dermatitis.
C E, Yunker, C E, Binninger, J E, Keirans, J, Beecham, M, Schlegel   +4 more
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MOTOR CORTEX OF THE BEAR (URSUS AMERICANUS)

Archives of Neurology & Psychiatry, 1933
Before 1870, the doctrine that the cerebral cortex was inexcitable to artificial stimulation was generally held by investigators. As early as 1756, Haller 1 reported a series of experiments performed six years before on dogs, cats and goats by his pupil Zinn, in which he was unable to produce muscular movements by mechanical or chemical irritation ...
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Picture object recognition in an American black bear (Ursus americanus)

Animal Cognition, 2016
Many animals have been tested for conceptual discriminations using two-dimensional images as stimuli, and many of these species appear to transfer knowledge from 2D images to analogous real life objects. We tested an American black bear for picture-object recognition using a two alternative forced choice task. She was presented with four unique sets of
Zoe, Johnson-Ulrich, Jennifer, Vonk, Mary, Humbyrd, Marilyn, Crowley, Ela, Wojtkowski, Florence, Yates, Stephanie, Allard   +6 more
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